MDMK4040T2R2MMV Equivalent & Substitute Parts

Part Overview

The MDMK4040T2R2MMV is a 2.2 µH shielded drum core wirewound inductor manufactured by Taiyo Yuden, rated for 2.8 A continuous current with a maximum DC resistance of 79 mOhm. This component is part of the MCOIL™ MD series and features AEC-Q200 automotive-grade qualification. The part is designated as "Not For New Designs," indicating it has been superseded in the manufacturer's product portfolio. Identifying equivalent substitute parts is necessary for ongoing production support, maintenance applications, and legacy system repairs where this inductor specification remains functionally required.

Substiute Parts

MDMK4040T2R2MMV

Taiyo YudenIn Stock: 1711MDMK4040T2R2MMV Datasheet

Current PartRFQ

LCDND4040MKT2R2MM

Taiyo YudenIn Stock: 885LCDND4040MKT2R2MM Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MDMK4040T2R2MMV is determined by strict equivalence across the following critical electrical and mechanical parameters:

Electrical Equivalence Criteria:

• Inductance value: 2.2 µH
• Inductance tolerance: ±20%
• Current rating: 2.8 A minimum
• Saturation current (Isat): 3.8 A minimum
• DC resistance: 79 mOhm maximum
• Operating temperature range: -40°C to 125°C minimum
• Inductance test frequency: 1 MHz

Mechanical Equivalence Criteria:

• Mounting type: Surface Mount
• Package dimensions: 4.00 mm L × 4.00 mm W × 1.20 mm H maximum
• Core material: Metal

Compliance Criteria:

• AEC-Q200 automotive qualification
• ROHS3 compliance
• Moisture Sensitivity Level 1

The LCDND4040MKT2R2MM meets all electrical and mechanical parameters. The primary distinction is shielding configuration: the substitute part is unshielded, whereas the main part is shielded. This difference is significant for electromagnetic interference (EMI) considerations and must be evaluated within the specific circuit application context.

Parameter Comparison

Engineering Selection Recommendations

LCDND4040MKT2R2MM as Primary Substitute:

The LCDND4040MKT2R2MM is the direct electrical and mechanical equivalent to the MDMK4040T2R2MMV. Both components are manufactured by Taiyo Yuden, share identical inductance, current ratings, DC resistance, temperature operating range, and package dimensions. Both components carry AEC-Q200 automotive qualification, ROHS3 compliance, and MSL 1 rating.

The LCDND4040MKT2R2MM holds Active product status, whereas the MDMK4040T2R2MMV is designated "Not For New Designs." This status difference indicates that the substitute part represents the current production offering from the manufacturer and is the appropriate selection for ongoing applications.

Shielding Consideration:

The LCDND4040MKT2R2MM is unshielded, while the MDMK4040T2R2MMV is shielded. In applications where electromagnetic shielding is a circuit requirement for noise suppression or EMI compliance, the unshielded substitute may not be functionally equivalent despite matching all other electrical parameters. Circuit-level evaluation is necessary to determine whether shielding is functionally required or whether the unshielded configuration is acceptable.

Compliance and Reliability:

Both parts meet automotive-grade AEC-Q200 qualification, ensuring reliability in demanding environments. Both are ROHS3 compliant and carry unlimited moisture sensitivity rating (MSL 1), indicating robust handling characteristics suitable for standard manufacturing processes.

Frequently Asked Questions (FAQ)

Q: Can the LCDND4040MKT2R2MM directly replace the MDMK4040T2R2MMV in all applications?

A: The LCDND4040MKT2R2MM matches all electrical and mechanical specifications of the MDMK4040T2R2MMV. However, the substitute part is unshielded while the original is shielded. Direct replacement is appropriate only in applications where electromagnetic shielding is not a functional requirement. Applications requiring shielded inductors for EMI suppression or noise filtering must evaluate whether the unshielded configuration meets circuit performance criteria.

Q: What is the significance of the "Not For New Designs" status on the MDMK4040T2R2MMV?

A: "Not For New Designs" indicates that the manufacturer has discontinued active development and promotion of this part number. The LCDND4040MKT2R2MM represents the current production alternative. For new circuit designs, the LCDND4040MKT2R2MM is the recommended selection. For legacy system support and maintenance, the MDMK4040T2R2MMV may still be available from inventory, but the substitute should be considered for long-term supply continuity.

Q: Are the package dimensions identical between these two parts?

A: Yes. Both the MDMK4040T2R2MMV and LCDND4040MKT2R2MM are 4.00 mm × 4.00 mm × 1.20 mm (maximum height). Both use surface mount technology and are compatible with standard PCB footprints designed for 4040 metric package inductors.

Q: Do both parts meet automotive qualification standards?

A: Yes. Both the MDMK4040T2R2MMV and LCDND4040MKT2R2MM carry AEC-Q200 automotive-grade qualification, indicating suitability for automotive and other demanding applications requiring high reliability standards.

Q: What is the difference in core construction between these parts?

A: The MDMK4040T2R2MMV is specified as a drum core wirewound inductor, while the LCDND4040MKT2R2MM is specified as a wirewound inductor. Both use metal core material. The functional electrical performance is equivalent at the specified inductance, current rating, and DC resistance values.

Q: Are there any differences in moisture sensitivity or handling requirements?

A: No. Both parts carry Moisture Sensitivity Level 1 (Unlimited), indicating they do not require special moisture control during storage or handling. Standard manufacturing and storage conditions are appropriate for both components.

Q: Can the LCDND4040MKT2R2MM be used in high-frequency filtering applications where the original shielded part was used?

A: The unshielded LCDND4040MKT2R2MM has identical electrical parameters (inductance, current rating, DC resistance) to the shielded MDMK4040T2R2MMV. However, the absence of shielding may result in increased electromagnetic coupling to adjacent circuit elements. Applications requiring shielded inductors for frequency filtering or noise suppression must evaluate whether the unshielded configuration introduces unacceptable EMI or performance degradation.